[Pw_forum] mixing in non-collinear case

[Cyrille Barreteau]

Dear pwscf users and developpers,

I was wondering what kind of mixing is used in the
non collinear version of pwscf (pwnc)
And more importantly which quantity is mixed?

i) the density matrix
rho=(rho up up, rho up dn
     rho dn up, rho dn dn)

ii) the magnetic vector in xyz coordinate n,mx,my,mz

or iii) the magnetic vector in spherical coordinate n,|m|,theta,phi

The case iii) seems rather attractive but I guess one
should not treat n,|m| on the same footing as theta and phi.

  cyrille

-- 
==================================================================
Cyrille Barreteau  | phone : +33 (0)1 69 08 29 51
CEA Saclay         | fax   : +33 (0)1 69 08 84 46
DSM/DRECAM/SPCSI   | email : cyrille.barreteau at cea.fr
Batiment 462       |
91191 Gif sur Yvette Cedex  FRANCE
           ~~~~~~~~~~~~~~~~~~~~~~~~
http://www-drecam.cea.fr/spcsi/index.php
http://www-drecam.cea.fr/Images/Pisp/cbarreteau/cbarreteau_fr.html
http://www-drecam.cea.fr/Phocea/Membres/Cours/index.php
==================================================================